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PD-S601
@ Test point and adjustment variable resistor positions
MAIN BOARD ASSEMBLY
Test mode
jumper wires
CN351
VR152
all
icis1 VRIS1
RF. BOARD ASSEMBLY
.
VR103 @
VR102
1C101
Figure 1 Adjustment Locations
@ Notes
1. Use a 10:1 probe for the oscilloscope.
2. All the knob positions (settings) for the oscilloscope in the adjustment procedures are for when a 10:1 probe is
used.
@ Test mode
These models have a test mode so that the adjustments and checks required for service can be carried out easily.
When these models are in test mode, the keys on the front panel work differently from normal. Adjustments and
checks can be carried out by operating these keys with the correct procedure. For these models, all adjustments are
carried out in test mode.
[Setting these models to test mode}
How to set this model into test mode.
1. Unplug the power cord fror: the AC socket.
2. Short the test mode jumper .:ires. (See Figure 1.)
3. Plug the power cord hack into the AC socket.
When the test mode is set correctly, the display is different from what it usually is when the power is turned on. If
the display is still the same as usual, test mode has not been set correctly, so repeat Steps 1 — 3.
2s
[Release from test mode]
Here is the procedure for releasing the test mode:
1. Press the STOP key and stop all operations.
2. Unplug the power cord from the AC socket.
[Operations of the keys in test mode]
PD-S601
Function In test mode
Explanation
lj
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|
7
PAUSE
Tracking servo
,
close/open
The laser diode 'is lit up and the focus actuator is
lowered, then raised slowly and the focus servo is closed
at the point where the objective lens is focused on the
disc.
With the player in this state, if you lightly rotate the
stopped disc by hand, you can hear the sound the focus
servo.
If you can hear this sound, the focus servo is operating
correctly. If you press this key with no disc mounted, the
laser diode lights up, the focus actuator is pulled down,
then the actuator is raised and lowered twice and
returned to its origina! position.
Starts the spindle motor in the clockwise direction and
when the disc rotation reaches the prescribed speed
(about 500 rpm at the inner periphery), sets the spindle
servo in a closed loop.
Be careful.
Pressing this key when there is no disc
mounted makes the spindle motor run at the maximum
speed.
If the focus servo does not go correctly into a closed loop
or the laser light shines on the mirror section at the
outermost periphery of the disc, the same symptom is
occurred.
Pressing this key when the focus servo and spindle servo
are operating correctly in closed loops puts the tracking
servo into a closed loop, displays the track number being
played back and the elapsed time on the front panel, and
outputs the playback signal.
If the elapsed time is not displayed or not counted
correctly or the audio is not played back correctly, it may
be that the laser is shining on the section with no sound
recorded at the outer edge of the disc, that something is
out of adjustment, or that there is some other problem.
This key is a toggle key and open/close the tracking
servo alternately. This key has no effect if no disc is
mounted.
2s
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